April

2015

 * April 28, 2015 - MAKOPOID is introduced

2014

 * April 4, 2014 - Endetou is introduced

2013

 * April 26, 2013 - Miyako Yutsu is introduced

2012

 * April 02, 2012 - Yuwaku Koe is introduced
 * April 06, 2012 - Birthdate of Kagamine Renee and Kagamine Lenku
 * April 07, 2012 - Misaki Jonetsune is introduced
 * April 12, 2012 - Shine rokune is introduced
 * April 23, 2012 - Kadane Ken and Kadane Lin are introduced, their birthdate is the same
 * April 28, 2012 - Camila Nunez and Kamiro Nunez are introduced
 * April 30, 2012 - Tamasine Nakamura is introduced

2009

 * April 18, 2009 - Sora Harune is introduced, her birthdate is the same.
 * April 23, 2009 - Bitter Annie is introduced

2008

 * April 01, 2008 - Mokaito is introduced
 * April 05, 2008 - Anone Muri is introduced
 * April 11, 2008 - Sakine Meiko is introduced

Misc

 * April 03, 29XX - Birthdate of Kay Keirai
 * April 09, 0000 - Birthdate of Kasane Keko
 * April 15, 0000 - Birthdate of Hatori Longshadow
 * April 18, 1994 - Birthdate of Skylox Kagamine
 * April 16, 1997 - Birthdate of Melody Chikaba
 * April 17, 1996 - Birthdate of Deadlox
 * April 17, 1995 - Birthdate of Endetou
 * April 21, 1996 - Birthdate of Vladislav Kajdar
 * April 29, 1994 - Birthdate of Kiruku McCoy-Fúrthér